checking for gfind... /opt/local/bin/gfind checking for sort... /opt/local/bin/sort checking for GHC version date... given 8.1.20160218 checking for GHC Git commit id... inferred 0c420cb6fdf25a6779785e18d88c9ca9d3695af1 checking for ghc... /usr/local/bin/ghc checking version of ghc... 7.8.4 configure: error: GHC version 7.10 or later is required to compile GHC.